This is the bari sax from the Reason Factory Sound Bank. Breath control added, of course. I used the mf version of the multi sample and just varied the filter and dynamics.
Usually, I don't like playing sax sounds on the gig, because I play sax and it just never sounds quite right. I make an exception in this case because the samples are really good, the effect of having a funky bari on your tune is way cool and it sure beats lugging around 40 pounds of brass! Easier on the neck, too.